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LM4871M +BOM

This audio amplifier, part of the Boomer series, is able to deliver 3W of power with the option of a shutdown mode

LM4871M Information

Description

The Texas Instruments LM4871M is a 3-W, mono, analog input Class-AB audio amplifier in an SOIC-8 package. It's designed for portable audio devices such as smartphones, tablets, and laptops, driving small speakers. The amplifier features unity-gain stability, no output coupling capacitors or bootstrap capacitors are required, and it has external gain configuration capability. With a supply voltage range of 2.0V to 5.5V, the LM4871M is suitable for battery-powered devices and portable gaming systems. It's pin-compatible with the LM4861 and offers low power consumption in shutdown mode (0.6µA typical). The amplifier provides high-quality audio performance with a THD at 1kHz of 0.5% maximum.

Features

According to the product information, the LM4871M features:

  • No Output Coupling Capacitors, Bootstrap Capacitors, or Snubber Circuits Required
  • Unity-gain Stable
  • WSON, VSSOP, SOIC, or PDIP Packaging
  • External Gain Configuration Capability
  • Pin Compatible with the LM4861

These features make it suitable for use in portable audio devices such as smartphones, tablets, and laptops, as well as battery-powered devices and other portable electronic devices requiring audio amplification in a small form factor.

Package

The package type of LM4871M is SOIC-8.

Manufacturer

The manufacturer of the LM4871M is Texas Instruments (TI), a leading global semiconductor company that designs, manufactures, tests, and sells analog and embedded processing chips. TI's products include microprocessors, memory devices, sensors, and other semiconductor components used in a wide range of applications, including consumer electronics, automotive systems, industrial automation, and more.

Applications

The LM4871M is commonly used in portable audio devices such as smartphones, tablets, and laptops for driving small speakers. It's also used in battery-powered devices, portable gaming systems, and other portable electronic devices requiring audio amplification in a small form factor.

Equivalent

According to Texas Instruments' documentation, the LM4871M has pin compatibility with the LM4861. Therefore, other analog input Class-AB audio amplifiers that have similar characteristics to the LM4871M could be considered equivalent products. Some possible alternatives include the LM4760, LM4886, and LM4887 series of audio amplifiers from Texas Instruments.

lm4871m

Specifications

Category Integrated Circuits (ICs)LinearAmplifiersAudio Amplifiers Type Class AB
Output Type 1-Channel (Mono) Max Output Power x Channels @ Load 3W x 1 @ 3Ohm
Voltage - Supply 2V ~ 5.5V Features Shutdown, Thermal Protection
Mounting Type Surface Mount Operating Temperature -40°C ~ 85°C (TA)
Base Product Number LM4871 Audio input type Analog Input
Architecture Class-AB Speaker channels (max) Mono
Rating Catalog Power stage supply (max) (V) 5.5
Power stage supply (min) (V) 2 Load (min) (Ω) 3
Output power (W) 3 THD + N at 1 kHz (%) 0.13
Iq (typ) (mA) 6.5 Control interface Hardware
Closed/open loop Closed Analog supply (min) (V) 2
Analog supply voltage (max) (V) 5.5 PSRR (dB) 60
Operating temperature range (°C) -40 to 85 Pin Count 8
Released Date Apr 16, 2015 Last Modified Date Mar 7, 2023 4:10 PM UTC
Package/Case SOP-8

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Ratings and Reviews

More
B
B**y 07/01/2023

Blink slowly at first, then quickly. Work from 3,3 v. If you apply 3,3 v, the current limiting summary is not needed.

10
T
T**r 06/06/2023

Diodes are excellent!

18
J
J**n 03/14/2023

Thank you very much !

16
D
D**a 02/01/2022

Shipping in 35 days as in description.

14

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